Numerical Study of Flow Characteristics Around Underwater Vehicle Model at High Reynolds Number

摘要

Underwater vehicles have been widely developed for military and civilapplications, which can be simplified as two-dimensional bluff bodies.In order to explore the flow field morphology of the underwater vehiclemodel at high Reynolds numbers, the large eddy simulation combinedwith lattice Boltzmann method (LES-LBM) is adopted owing to the advantagesof the LBM for its simple algorithm formulation, simple boundarytreatment and natural parallelism. The standard Smagorinsky Sub-Grid Stress(SGS) model and a Bhatnagar-Gross-Krook (BGK) form ofthe lattice Boltzmann method are adopted. The drag and lift characteristics,the vorticity, streamline distribution and the vortex shedding frequencyare investigated. Numerical results are compared with those ofthe Finite Volume method (FVM) software calculations and indicategood agreements.